LONDON, Jan 18 (Reuters) - Euro zone banks weighed on European stocks on Monday after news that the European Central Bank was scrutinising some non-performing loans, although oil and gas companies provided some support for the broader market.

The euro zone bank sector fell 3.8 percent, with traders citing news over the weekend that the ECB is quizzing a number of euro zone banks about non-performing loans as it ramps up efforts to tackle the region’s mountain of bad debt.

“The uncertainty in the market, be it in Europe or wherever else, is causing these banks to suffer,” Mark Foulds, sales trader at ETX Capital, said. The sector is also under pressure from the recent volatility over China, he added.

“When the markets fall like they have done, everyone feels on edge. The market is dire, and there’s not the liquidity that there used to be, which can mean the market gets oversold.”

The FTSEurofirst 300 touched its lowest level in more than a year, and some said the ECB might act to provide more stimulus when it meets later this week, given the 10 percent drop in European shares driven by weak oil prices and concerns over China.

“This week’s ECB meeting might highlight that the ECB has some options available. We doubt that this will be sufficient to stop the downward pressure in the medium term,” strategists at RBC said in a note.

Energy shares stabilised after a steep drop last session, up 0.5 percent, after both Brent and U.S. crude turned positive having hit their lowest levels since 2003 after sanctions on Iran were lifted.

Top climber overall was Adidas, up 5.5 percent, after it appointed Henkel’s Kasper Rorsted as CEO. Henkel’s shares fell 4.2 percent.